Does anyone know where I can get sculpting clay (WED,waterbased and oil-based) and Ultracal 30 gypsum cement in bulk near central Arkansas. I need pretty big quantities and its expensive to ship. Would like to find somewhere in driving distance to buy in bulk. Any help is appreciated.

The easiest way to find it is to get a phone book and look for Ceramic supply places, then call and ask if they have ultracal 30, they will have water based clay and they will most likely have hydrocal plaster- you should be able to find it within and hour or so of you. Definitely look in a phone book, they tend to be a bit old school with their advertising.
Allen H